Big Bertha about to head under downtown Seattle for 14 months

Say goodbye to Big Bertha. The world's largest tunneling machine is about to disappear under downtown Seattle.

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Big Bertha, the tunnel boring machine, will head underground very soon. The last chance for the public to say goodbye is Saturday.
Photo by (Image courtesy Washington Department of Transportation)
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KIRO Radio Staff, Staff report
Straight from the newsdesk.

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